The Single Setting That Decides Resin Quality
If your posts keep blushing, your small features melt away, or supports refuse to detach, the culprit is almost always exposure time. Getting this one value right does more for resin print quality than any other slice setting. This guide walks through how exposure controls cure depth and how to tune it for Standard Lite Resin and Standard Resin.
What Exposure Actually Does
LCD printers cure a thin layer of resin by projecting UV light through a screen. Exposure time determines how deep the UV penetrates and how completely each layer hardens:
- Under-exposure → soft prints, layer delamination, washed-out detail.
- Over-exposure → bloated details, lost holes, prints stuck to the film.
- Balanced → crisp surfaces with clean negative features.
Two Exposure Values You Must Tune
Every resin profile needs two numbers — the base layers (higher, to grip the build plate) and the normal layers (lower, for detail and speed):
| Resin | Base Layer Exposure | Normal Layer Exposure | Layer Height | Notes |
|---|---|---|---|---|
| Standard Resin | 25–35s | 2.0–2.6s | 50μm | Standard LCD benchmark |
| Standard Lite | 30–40s | 2.4–3.2s | 50μm | Add time for translucency |
| ABS-Like / Tough | 30–40s | 2.4–3.0s | 50μm | Tune per resin sheet |
These are starting points. Always confirm with the resin manufacturer's official settings sheet if one is published.
A Fast Two-Print Tuning Method
- Print a small exposure test part (cone or calibration matrix) at your normal layer height.
- Find the row where pillars hold and holes stay open → that is your normal exposure.
- If parts lift early, raise base exposure or add base layers; if they stick, reduce base exposure.
- Note the winning values in a profile so you never re-tune the same resin twice.
Matches and Other Practical Tips
- Keep the vat well-mixed and at a consistent temperature; cold resin needs more exposure.
- Use the same resin every run — every bottle cures slightly differently.
- Wash and dry fully before curing; glossy residue left on the part ruins the final finish.
Putting It Together
Exposure tuning is a 10-minute investment that pays off in every print after it. Start with the suggested ranges for Standard Resin or Standard Lite, run one calibration part, and lock in your numbers. From there, consistent, high-detail LCD printing is just a matter of repeating what works.